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community/bolt/src/main/java/org/neo4j/bolt/v3/messaging/request/MessageMetadataParser.java
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| /* | ||
| * Copyright (c) 2002-2018 "Neo4j," | ||
| * Neo4j Sweden AB [http://neo4j.com] | ||
| * | ||
| * This file is part of Neo4j. | ||
| * | ||
| * Neo4j is free software: you can redistribute it and/or modify | ||
| * it under the terms of the GNU General Public License as published by | ||
| * the Free Software Foundation, either version 3 of the License, or | ||
| * (at your option) any later version. | ||
| * | ||
| * This program is distributed in the hope that it will be useful, | ||
| * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| * GNU General Public License for more details. | ||
| * | ||
| * You should have received a copy of the GNU General Public License | ||
| * along with this program. If not, see <http://www.gnu.org/licenses/>. | ||
| */ | ||
| package org.neo4j.bolt.v3.messaging.request; | ||
|
|
||
| import java.time.Duration; | ||
| import java.util.HashMap; | ||
| import java.util.Map; | ||
|
|
||
| import org.neo4j.bolt.messaging.BoltIOException; | ||
| import org.neo4j.bolt.v1.runtime.bookmarking.Bookmark; | ||
| import org.neo4j.graphdb.Node; | ||
| import org.neo4j.graphdb.Relationship; | ||
| import org.neo4j.graphdb.spatial.Point; | ||
| import org.neo4j.internal.kernel.api.exceptions.KernelException; | ||
| import org.neo4j.kernel.api.exceptions.Status; | ||
| import org.neo4j.kernel.impl.util.BaseToObjectValueWriter; | ||
| import org.neo4j.values.AnyValue; | ||
| import org.neo4j.values.storable.CoordinateReferenceSystem; | ||
| import org.neo4j.values.storable.LongValue; | ||
| import org.neo4j.values.storable.Values; | ||
| import org.neo4j.values.virtual.MapValue; | ||
|
|
||
| /** | ||
| * The parsing methods in this class returns null if the specified key is not found in the input message metadata map. | ||
| */ | ||
| class MessageMetadataParser | ||
| { | ||
| private static final String TX_TIMEOUT_KEY = "tx_timeout"; | ||
| private static final String TX_META_DATA_KEY = "tx_metadata"; | ||
|
|
||
| static Bookmark parseBookmark( MapValue meta ) throws BoltIOException | ||
| { | ||
| try | ||
| { | ||
| return Bookmark.fromParamsOrNull( meta ); | ||
| } | ||
| catch ( KernelException e ) | ||
| { | ||
| throw new BoltIOException( Status.Request.InvalidFormat, e.getMessage(), e ); | ||
| } | ||
| } | ||
|
|
||
| static Duration parseTransactionTimeout( MapValue meta ) throws BoltIOException | ||
| { | ||
| AnyValue anyValue = meta.get( TX_TIMEOUT_KEY ); | ||
| if ( anyValue == Values.NO_VALUE ) | ||
| { | ||
| return null; | ||
| } | ||
| else if ( anyValue instanceof LongValue ) | ||
| { | ||
| return Duration.ofMillis( ((LongValue) anyValue).longValue() ); | ||
| } | ||
| else | ||
| { | ||
| throw new BoltIOException( Status.Request.InvalidFormat, "Expecting transaction timeout value to be a Long value, but got: " + anyValue ); | ||
| } | ||
| } | ||
|
|
||
| static Map<String,Object> parseTransactionMetadata( MapValue meta ) throws BoltIOException | ||
| { | ||
| AnyValue anyValue = meta.get( TX_META_DATA_KEY ); | ||
| if ( anyValue == Values.NO_VALUE ) | ||
| { | ||
| return null; | ||
| } | ||
| else if ( anyValue instanceof MapValue ) | ||
| { | ||
| MapValue mapValue = (MapValue) anyValue; | ||
| TransactionMetadataWriter writer = new TransactionMetadataWriter(); | ||
| Map<String,Object> txMeta = new HashMap<>( mapValue.size() ); | ||
| mapValue.foreach( ( key, value ) -> txMeta.put( key, writer.valueAsObject( value ) ) ); | ||
| return txMeta; | ||
| } | ||
| else | ||
| { | ||
| throw new BoltIOException( Status.Request.InvalidFormat, "Expecting transaction metadata value to be a Map value, but got: " + anyValue ); | ||
| } | ||
| } | ||
|
|
||
| private static class TransactionMetadataWriter extends BaseToObjectValueWriter<RuntimeException> | ||
| { | ||
| @Override | ||
| protected Node newNodeProxyById( long id ) | ||
| { | ||
| throw new UnsupportedOperationException( "Transaction metadata should not contain nodes" ); | ||
| } | ||
|
|
||
| @Override | ||
| protected Relationship newRelationshipProxyById( long id ) | ||
| { | ||
| throw new UnsupportedOperationException( "Transaction metadata should not contain relationships" ); | ||
| } | ||
|
|
||
| @Override | ||
| protected Point newPoint( CoordinateReferenceSystem crs, double[] coordinate ) | ||
| { | ||
| return Values.pointValue( crs, coordinate ); | ||
| } | ||
|
|
||
| Object valueAsObject( AnyValue value ) | ||
| { | ||
| value.writeTo( this ); | ||
| return value(); | ||
| } | ||
| } | ||
| } |
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